 (at the HP48).
 (at the HP48).
| Pin | Name | Dir | Description | 
|---|---|---|---|
| 1 | SHIELD |  | Shield | 
| 2 | TXD |  | Transmit Data | 
| 3 | RXD |  | Receive Data | 
| 4 | GND |  | Ground | 
  Note: Direction is HP48 relative Computer.
| Contributor: | Joakim Ögren | 
| Source: | comp.sys.hp48 FAQ | 
  Copyright © The Hardware Book Team 1996-2004.
  May be copied and redistributed, partially or in whole, as appropriate.
  Document last modified: 2002-01-13